Aspect ratio-controlled preparation of α-CaSO₄·0.5H₂O from phosphogypsum in potassium tartrate aqueous solution

Abstract

The conversion of industrial gypsum to rod-shaped α-CaSO4·0.5H2O crystals with tunable aspect ratio in a H2O system is realized with potassium tartrate.

Effect of Cu2+ on the nucleation kinetics and crystallization of rod-shaped CaSO4·2H2O in aqueous solution

“…The X-ray diffraction (XRD) pattern of the obtained crystals is shown in Fig. 1b and the main diffraction peaks about at 11.67°, 20.79°, 23.42°, 29.16° and 31.20° are assigned to CaSO 4 ·2H 2 O (020), (021), (040), (041) and (−221) facets (JCPDS 33-0311), 40 respectively.…”

Leaching of phosphate ores with lower dissolution of metallic impurities: the dual role of sodium oleate

“…10b-e presents (020), (021), (040), and (041) surfaces of PG crystals, which are also in line with previous reports. 46,47 The adsorption of SOL on surfaces (020), ( 021), (040), and (041) of CaSO 4 $2H 2 O are visualized in Fig. S7, † and the corresponding adsorption energy is 0.44, −2.33, −1.13, and −6.72 eV, as tabulated in Table 2.…”

Self-Symmetrical 3D Hierarchical α-Calcium Sulfate Hemihydrate Twin-Flowers Composed of Microplates as a Renewable Material for Water Separation from Water-in-Oil Emulsion

“…19 Recently, controlling the morphology of HH crystals has attracted much more attention in the scientific community because of the morphology-dependent properties, such as mechanical strength, filtration rate, packing density, and so on. 21 So far, great progress has been made in the synthesis of HH with well-defined morphologies such as whiskers, 22 wires, 23 long columns, 24 rods, 25 plates, 26 and granule. 27 These morphologies are all evolved from a one-dimensional (1D) structure.…”